diff options
Diffstat (limited to 'drivers/usb/host/isp1760-if.c')
| -rw-r--r-- | drivers/usb/host/isp1760-if.c | 473 |
1 files changed, 473 insertions, 0 deletions
diff --git a/drivers/usb/host/isp1760-if.c b/drivers/usb/host/isp1760-if.c new file mode 100644 index 00000000..4592dc17 --- /dev/null +++ b/drivers/usb/host/isp1760-if.c @@ -0,0 +1,473 @@ +/* + * Glue code for the ISP1760 driver and bus + * Currently there is support for + * - OpenFirmware + * - PCI + * - PDEV (generic platform device centralized driver model) + * + * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de> + * + */ + +#include <linux/usb.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/usb/isp1760.h> +#include <linux/usb/hcd.h> + +#include "isp1760-hcd.h" + +#if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ) +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_gpio.h> +#endif + +#ifdef CONFIG_PCI +#include <linux/pci.h> +#endif + +#if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ) +struct isp1760 { + struct usb_hcd *hcd; + int rst_gpio; +}; + +static int of_isp1760_probe(struct platform_device *dev) +{ + struct isp1760 *drvdata; + struct device_node *dp = dev->dev.of_node; + struct resource *res; + struct resource memory; + struct of_irq oirq; + int virq; + resource_size_t res_len; + int ret; + unsigned int devflags = 0; + enum of_gpio_flags gpio_flags; + u32 bus_width = 0; + + drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + ret = of_address_to_resource(dp, 0, &memory); + if (ret) { + ret = -ENXIO; + goto free_data; + } + + res_len = resource_size(&memory); + + res = request_mem_region(memory.start, res_len, dev_name(&dev->dev)); + if (!res) { + ret = -EBUSY; + goto free_data; + } + + if (of_irq_map_one(dp, 0, &oirq)) { + ret = -ENODEV; + goto release_reg; + } + + virq = irq_create_of_mapping(oirq.controller, oirq.specifier, + oirq.size); + + if (of_device_is_compatible(dp, "nxp,usb-isp1761")) + devflags |= ISP1760_FLAG_ISP1761; + + /* Some systems wire up only 16 of the 32 data lines */ + of_property_read_u32(dp, "bus-width", &bus_width); + if (bus_width == 16) + devflags |= ISP1760_FLAG_BUS_WIDTH_16; + + if (of_get_property(dp, "port1-otg", NULL) != NULL) + devflags |= ISP1760_FLAG_OTG_EN; + + if (of_get_property(dp, "analog-oc", NULL) != NULL) + devflags |= ISP1760_FLAG_ANALOG_OC; + + if (of_get_property(dp, "dack-polarity", NULL) != NULL) + devflags |= ISP1760_FLAG_DACK_POL_HIGH; + + if (of_get_property(dp, "dreq-polarity", NULL) != NULL) + devflags |= ISP1760_FLAG_DREQ_POL_HIGH; + + drvdata->rst_gpio = of_get_gpio_flags(dp, 0, &gpio_flags); + if (gpio_is_valid(drvdata->rst_gpio)) { + ret = gpio_request(drvdata->rst_gpio, dev_name(&dev->dev)); + if (!ret) { + if (!(gpio_flags & OF_GPIO_ACTIVE_LOW)) { + devflags |= ISP1760_FLAG_RESET_ACTIVE_HIGH; + gpio_direction_output(drvdata->rst_gpio, 0); + } else { + gpio_direction_output(drvdata->rst_gpio, 1); + } + } else { + drvdata->rst_gpio = ret; + } + } + + drvdata->hcd = isp1760_register(memory.start, res_len, virq, + IRQF_SHARED, drvdata->rst_gpio, + &dev->dev, dev_name(&dev->dev), + devflags); + if (IS_ERR(drvdata->hcd)) { + ret = PTR_ERR(drvdata->hcd); + goto free_gpio; + } + + dev_set_drvdata(&dev->dev, drvdata); + return ret; + +free_gpio: + if (gpio_is_valid(drvdata->rst_gpio)) + gpio_free(drvdata->rst_gpio); +release_reg: + release_mem_region(memory.start, res_len); +free_data: + kfree(drvdata); + return ret; +} + +static int of_isp1760_remove(struct platform_device *dev) +{ + struct isp1760 *drvdata = dev_get_drvdata(&dev->dev); + + dev_set_drvdata(&dev->dev, NULL); + + usb_remove_hcd(drvdata->hcd); + iounmap(drvdata->hcd->regs); + release_mem_region(drvdata->hcd->rsrc_start, drvdata->hcd->rsrc_len); + usb_put_hcd(drvdata->hcd); + + if (gpio_is_valid(drvdata->rst_gpio)) + gpio_free(drvdata->rst_gpio); + + kfree(drvdata); + return 0; +} + +static const struct of_device_id of_isp1760_match[] = { + { + .compatible = "nxp,usb-isp1760", + }, + { + .compatible = "nxp,usb-isp1761", + }, + { }, +}; +MODULE_DEVICE_TABLE(of, of_isp1760_match); + +static struct platform_driver isp1760_of_driver = { + .driver = { + .name = "nxp-isp1760", + .owner = THIS_MODULE, + .of_match_table = of_isp1760_match, + }, + .probe = of_isp1760_probe, + .remove = of_isp1760_remove, +}; +#endif + +#ifdef CONFIG_PCI +static int __devinit isp1761_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + u8 latency, limit; + __u32 reg_data; + int retry_count; + struct usb_hcd *hcd; + unsigned int devflags = 0; + int ret_status = 0; + + resource_size_t pci_mem_phy0; + resource_size_t memlength; + + u8 __iomem *chip_addr; + u8 __iomem *iobase; + resource_size_t nxp_pci_io_base; + resource_size_t iolength; + + if (usb_disabled()) + return -ENODEV; + + if (pci_enable_device(dev) < 0) + return -ENODEV; + + if (!dev->irq) + return -ENODEV; + + /* Grab the PLX PCI mem maped port start address we need */ + nxp_pci_io_base = pci_resource_start(dev, 0); + iolength = pci_resource_len(dev, 0); + + if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) { + printk(KERN_ERR "request region #1\n"); + return -EBUSY; + } + + iobase = ioremap_nocache(nxp_pci_io_base, iolength); + if (!iobase) { + printk(KERN_ERR "ioremap #1\n"); + ret_status = -ENOMEM; + goto cleanup1; + } + /* Grab the PLX PCI shared memory of the ISP 1761 we need */ + pci_mem_phy0 = pci_resource_start(dev, 3); + memlength = pci_resource_len(dev, 3); + if (memlength < 0xffff) { + printk(KERN_ERR "memory length for this resource is wrong\n"); + ret_status = -ENOMEM; + goto cleanup2; + } + + if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) { + printk(KERN_ERR "host controller already in use\n"); + ret_status = -EBUSY; + goto cleanup2; + } + + /* map available memory */ + chip_addr = ioremap_nocache(pci_mem_phy0,memlength); + if (!chip_addr) { + printk(KERN_ERR "Error ioremap failed\n"); + ret_status = -ENOMEM; + goto cleanup3; + } + + /* bad pci latencies can contribute to overruns */ + pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency); + if (latency) { + pci_read_config_byte(dev, PCI_MAX_LAT, &limit); + if (limit && limit < latency) + pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit); + } + + /* Try to check whether we can access Scratch Register of + * Host Controller or not. The initial PCI access is retried until + * local init for the PCI bridge is completed + */ + retry_count = 20; + reg_data = 0; + while ((reg_data != 0xFACE) && retry_count) { + /*by default host is in 16bit mode, so + * io operations at this stage must be 16 bit + * */ + writel(0xface, chip_addr + HC_SCRATCH_REG); + udelay(100); + reg_data = readl(chip_addr + HC_SCRATCH_REG) & 0x0000ffff; + retry_count--; + } + + iounmap(chip_addr); + + /* Host Controller presence is detected by writing to scratch register + * and reading back and checking the contents are same or not + */ + if (reg_data != 0xFACE) { + dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data); + ret_status = -ENOMEM; + goto cleanup3; + } + + pci_set_master(dev); + + /* configure PLX PCI chip to pass interrupts */ +#define PLX_INT_CSR_REG 0x68 + reg_data = readl(iobase + PLX_INT_CSR_REG); + reg_data |= 0x900; + writel(reg_data, iobase + PLX_INT_CSR_REG); + + dev->dev.dma_mask = NULL; + hcd = isp1760_register(pci_mem_phy0, memlength, dev->irq, + IRQF_SHARED, -ENOENT, &dev->dev, dev_name(&dev->dev), + devflags); + if (IS_ERR(hcd)) { + ret_status = -ENODEV; + goto cleanup3; + } + + /* done with PLX IO access */ + iounmap(iobase); + release_mem_region(nxp_pci_io_base, iolength); + + pci_set_drvdata(dev, hcd); + return 0; + +cleanup3: + release_mem_region(pci_mem_phy0, memlength); +cleanup2: + iounmap(iobase); +cleanup1: + release_mem_region(nxp_pci_io_base, iolength); + return ret_status; +} + +static void isp1761_pci_remove(struct pci_dev *dev) +{ + struct usb_hcd *hcd; + + hcd = pci_get_drvdata(dev); + + usb_remove_hcd(hcd); + iounmap(hcd->regs); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + usb_put_hcd(hcd); + + pci_disable_device(dev); +} + +static void isp1761_pci_shutdown(struct pci_dev *dev) +{ + printk(KERN_ERR "ips1761_pci_shutdown\n"); +} + +static const struct pci_device_id isp1760_plx [] = { + { + .class = PCI_CLASS_BRIDGE_OTHER << 8, + .class_mask = ~0, + .vendor = PCI_VENDOR_ID_PLX, + .device = 0x5406, + .subvendor = PCI_VENDOR_ID_PLX, + .subdevice = 0x9054, + }, + { } +}; +MODULE_DEVICE_TABLE(pci, isp1760_plx); + +static struct pci_driver isp1761_pci_driver = { + .name = "isp1760", + .id_table = isp1760_plx, + .probe = isp1761_pci_probe, + .remove = isp1761_pci_remove, + .shutdown = isp1761_pci_shutdown, +}; +#endif + +static int __devinit isp1760_plat_probe(struct platform_device *pdev) +{ + int ret = 0; + struct usb_hcd *hcd; + struct resource *mem_res; + struct resource *irq_res; + resource_size_t mem_size; + struct isp1760_platform_data *priv = pdev->dev.platform_data; + unsigned int devflags = 0; + unsigned long irqflags = IRQF_SHARED; + + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem_res) { + pr_warning("isp1760: Memory resource not available\n"); + ret = -ENODEV; + goto out; + } + mem_size = resource_size(mem_res); + if (!request_mem_region(mem_res->start, mem_size, "isp1760")) { + pr_warning("isp1760: Cannot reserve the memory resource\n"); + ret = -EBUSY; + goto out; + } + + irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!irq_res) { + pr_warning("isp1760: IRQ resource not available\n"); + return -ENODEV; + } + irqflags |= irq_res->flags & IRQF_TRIGGER_MASK; + + if (priv) { + if (priv->is_isp1761) + devflags |= ISP1760_FLAG_ISP1761; + if (priv->bus_width_16) + devflags |= ISP1760_FLAG_BUS_WIDTH_16; + if (priv->port1_otg) + devflags |= ISP1760_FLAG_OTG_EN; + if (priv->analog_oc) + devflags |= ISP1760_FLAG_ANALOG_OC; + if (priv->dack_polarity_high) + devflags |= ISP1760_FLAG_DACK_POL_HIGH; + if (priv->dreq_polarity_high) + devflags |= ISP1760_FLAG_DREQ_POL_HIGH; + } + + hcd = isp1760_register(mem_res->start, mem_size, irq_res->start, + irqflags, -ENOENT, + &pdev->dev, dev_name(&pdev->dev), devflags); + if (IS_ERR(hcd)) { + pr_warning("isp1760: Failed to register the HCD device\n"); + ret = -ENODEV; + goto cleanup; + } + + pr_info("ISP1760 USB device initialised\n"); + return ret; + +cleanup: + release_mem_region(mem_res->start, mem_size); +out: + return ret; +} + +static int __devexit isp1760_plat_remove(struct platform_device *pdev) +{ + struct resource *mem_res; + resource_size_t mem_size; + + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mem_size = resource_size(mem_res); + release_mem_region(mem_res->start, mem_size); + + return 0; +} + +static struct platform_driver isp1760_plat_driver = { + .probe = isp1760_plat_probe, + .remove = __devexit_p(isp1760_plat_remove), + .driver = { + .name = "isp1760", + }, +}; + +static int __init isp1760_init(void) +{ + int ret, any_ret = -ENODEV; + + init_kmem_once(); + + ret = platform_driver_register(&isp1760_plat_driver); + if (!ret) + any_ret = 0; +#if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ) + ret = platform_driver_register(&isp1760_of_driver); + if (!ret) + any_ret = 0; +#endif +#ifdef CONFIG_PCI + ret = pci_register_driver(&isp1761_pci_driver); + if (!ret) + any_ret = 0; +#endif + + if (any_ret) + deinit_kmem_cache(); + return any_ret; +} +module_init(isp1760_init); + +static void __exit isp1760_exit(void) +{ + platform_driver_unregister(&isp1760_plat_driver); +#if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ) + platform_driver_unregister(&isp1760_of_driver); +#endif +#ifdef CONFIG_PCI + pci_unregister_driver(&isp1761_pci_driver); +#endif + deinit_kmem_cache(); +} +module_exit(isp1760_exit); |